Combinatoria. 08 Árboles generadores

New channel Jesús Nieto Martínez: title sample judged 'whole' (A structured university-level math teaching channel organized into complete course playlists, with nearly every upload a); passed a second screen for sellers/exam-prep/re-uploads; 2 of 3 sampled transcripts showed teaching, 0 not; every title checked strictly; oEmbed verified.